Joe Mauer should have the right to play catcher for the Twins as long as he wants to. But what if the all-world Mauer would prefer to change positions, and become an infielder starting in the 2011 season? The depth chart might look like this...
2010 depth chart
2011 depth chart
catcher: Wilson Ramos, Drew Butera
third base: Joe Mauer, a backup infielder
That would work just fine.